Cross-Dehydrogenative Cyclization–Dimerization Cascade Sequence for the Synthesis of Symmetrical 3,3′-Bisoxindoles
作者:Farhaan Dobah、C. Munashe Mazodze、Wade F. Petersen
DOI:10.1021/acs.orglett.1c01799
日期:2021.7.16
The synthesis of symmetrical 3,3′-bisoxindoles from simple acyclic β-oxoanilides is reported. The described method forges three new C–C bonds in a single step via a sequential Mn(OAc)3·2H2O mediated oxidative radical cyclization-fragmentation–dimerization process. The scope of this reaction is demonstrated in the preparation of a variety of 3,3′-bisoxindoles, as well as its application toward the formal
报道了从简单的无环 β-氧代苯胺合成对称的 3,3'-双氧代吲哚。所描述的方法通过连续的 Mn(OAc) 3 · 2H 2 O 介导的氧化自由基环化-断裂-二聚化过程在一个步骤中形成三个新的 C-C 键。该反应的范围体现在各种 3,3'-双氧吲哚的制备中,以及其在花萼科生物碱 (±)-叶蓍碱的正式合成中的应用。